Siemens S120 Manual page 180

DC link components
5.1 Blocksize
Risk of burns or damage resulting from high surface temperature of the braking resistor
The braking resistor can become very hot. You can be severely burnt when touching the
surface. Neighboring components can become damaged.
• Mount the braking resistor so that it cannot be touched. If this is not possible, at the
• To avoid temperature-related damage to adjacent components, follow these rules:
180
CAUTION
dangerous locations, attach an appropriate warning note that is clearly visible and easy
to understand.
For PM340 Power Modules:
– Ensure a cooling clearance of 100 mm on all sides of the braking resistor
For PM240-2 Power Modules installed horizontally close to the ground:
– Installation on sheet steel > 2 mm
– Ensure a cooling clearance of 250 mm at the sides of the braking resistor
– Cooling clearance of 1000 mm above the braking resistor
For PM240-2 Power Modules when installed vertically against a wall:
– Installation on sheet steel > 2 mm
– Observe a cooling clearance of 100 mm at the sides of the braking resistor
– Cooling clearance of 1000 mm above the braking resistor
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
AC Drive